I have a custom box for 335i e90. The box is for one 10" solo barrack square . Speaker is in center tilted about 30 degrees. It has a custom carbon fiber front cover. That gives it alittle more def then just a box.looking to get 350 obo for it.if Intretested you can email me at...troxclairt@yahoo.com then I can send pic. Enless someone tells me how to do from Iphone.